Seafloor spreading<span> is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge. </span>Seafloor spreading<span> helps explain continental drift in the theory of plate tectonics. </span>
that would be a primary source because it actually is his hat not a replica. a primary source is a firsthand, or the excerpt of someone who was actually there.
